What is the purpose of a tool changer in a CNC machine?

The purpose of a tool changer in a CNC machine is primarily to automatically switch out tools during the machining process. This function allows the CNC machine to perform multiple operations without needing manual intervention, increasing efficiency and productivity. By automatically changing tools, the machine can carry out complex machining jobs that involve different cutting tools for various tasks, such as drilling, milling, and tapping, all in one setup. This capability is crucial for high-volume production and precision work, as it reduces downtime and minimizes the risk of errors associated with manual tool changes.

The other options describe functions that are not the primary role of a tool changer. While cleaning the work area, assisting with programming tasks, and monitoring machine performance are important for the overall operation and maintenance of a CNC machine, they do not pertain to the specific purpose of the tool changer itself.